Hydrothermal synthesis, characterization, and optical properties of wolframite ZnWO4 nanorods

Parada Siriwong; Titipun Thongtem; Anukorn Phuruangrat; Somchai Thongtem

doi:10.1039/C0CE00402B

Hydrothermal synthesis, characterization, and optical properties of wolframite ZnWO₄nanorods

Parada Siriwong,^a Titipun Thongtem,*^b Anukorn Phuruangrat*^c and Somchai Thongtem^a

Author affiliations

* Corresponding authors

^a Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand

^b Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
E-mail: ttpthongtem@yahoo.com
Fax: +66 (0)53 892277
Tel: +66 (0)53 943341-45

^c Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkla, Thailand
E-mail: phuruangrat@hotmail.com

Abstract

In this research, the effects of pH, reaction temperature and holding reaction time on the synthesis of one-dimensional ZnWO₄ nanostructures by a hydrothermal method were studied. Phase, morphology and atomic vibration were characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), and Fourier transform infrared (FTIR) and Raman spectroscopy. The pure monoclinic ZnWO₄ structure was synthesized at the pH solutions of 7 and 8. By varying the pH values, the mixtures of monoclinic ZnWO₄ and hexagonal ZnO as major and minor phases were detected at the pH 9 and 10 solutions, and the pure hexagonal ZnO phase at the pH 11 and 12. SEM and TEM images proved that ZnWO₄ nanorods grew along the [021] direction, with the reaction temperature and time to control their morphologies. The Zn–O, Zn–O–W, and W–O stretching vibrations were detected at 474, 888, and 726 cm⁻¹, and their corresponding bending vibrations at 430, 826, and 582 cm⁻¹, respectively. The optical properties of ZnWO₄ nanorods were also investigated by UV-visible (UV-vis) and photoluminescence (PL) spectroscopy. The above analyses proved that the appropriate condition for synthesizing of ZnWO₄ nanorods is at pH 8 by the 200 °C and 24 h hydrothermal treatment.

Article information

https://doi.org/10.1039/C0CE00402B

Article type

Paper

Submitted

13 Jul 2010

Accepted

07 Oct 2010

First published

25 Nov 2010

Download Citation

CrystEngComm, 2011,13, 1564-1569

Permissions

Request permissions

Hydrothermal synthesis, characterization, and optical properties of wolframite ZnWO₄ nanorods

P. Siriwong, T. Thongtem, A. Phuruangrat and S. Thongtem, CrystEngComm, 2011, 13, 1564 DOI: 10.1039/C0CE00402B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

CrystEngComm